These bronchi further more divide into smaller and lesser tubes called bronchioles. The bronchioles ultimately produce very small air sacs termed alveoli, where by the actual gas Trade happens. b(1) : the circulation and Trade of gases during the lungs or gills that's simple to respiration (2) : artificial respiration https://ventilation89012.blogofchange.com/38171701/the-best-side-of-ventilation-installation